This Shimano chainring allows you to update your Ultegra FC-R8000 11-speed crankset with a chainring configuration to best fit your riding style. FEATURES: Integrates Shimano Hollowglide Technology: the high rigidity hollow structure cuts down on weight, yet maintains strength to provide better power transfer and quicker, more precise front shifting Features a weight saving 4-bolt design with a BCD of 110 mm SPECS: Color: Black Material: Aluminum Tooth Count: 39 Ring Position/Type: Inner Drivetrain Speeds: 11 Defined Color: Black Chainring BCD: 110 Shimano Asymmetric